A solar panel system with an area of 20 square meters has an efficiency of 18%. If the solar irradiance is 1000 W/m², calculate the total power output of the system.

A wind turbine with a blade length of 40 meters operates in an area with an air density of 1.225 kg/m³ and an average wind speed of 10 m/s. Calculate the kinetic energy of the wind intercepted by the turbine per second.

A biomass plant generates 15,000 kWh of energy from burning 10,000 kg of biomass. Calculate the energy efficiency of the plant if the calorific value of the biomass is 18 MJ/kg.

A hydroelectric dam has a water flow rate of 800 cubic meters per second and a height of 150 meters. If the efficiency of the power generation is 90%, calculate the power output in megawatts (MW). (Use g = 9.8 m/s² for gravitational acceleration and the density of water = 1000 kg/m³)

An energy-efficient appliance consumes 50 watts and runs for 8 hours per day. Calculate its annual energy consumption in kilowatt-hours (kWh).

In a geothermal power plant, if the thermal efficiency is 20% and the heat extracted from the geothermal reservoir is 2000 MJ, calculate the electrical energy produced in megajoules (MJ).

A concentrated solar power (CSP) plant has a thermal efficiency of 25% and receives 10,000 MJ of solar energy per day. Calculate the electrical energy output per day in megajoules (MJ).

A wind farm with 10 turbines, each with a capacity of 2 MW and a capacity factor of 35%, operates for 24 hours. Calculate the total energy produced by the wind farm in megawatt-hours (MWh).

A biomass plant burns 5000 kg of organic material with an energy content of 16 MJ/kg. If the conversion efficiency is 30%, calculate the electrical energy output in megajoules (MJ).

A pumped-storage hydroelectric system pumps water to a height of 200 meters using 1,000 MWh of energy. If the system has an efficiency of 70%, calculate the potential energy stored in megawatt-hours (MWh).

A geothermal power plant has an output of 50 MW and operates continuously for a year. Calculate the annual energy production in gigawatt-hours (GWh).

A solar farm has 200 panels, each generating 250 watts. If the farm receives 5 hours of sunlight per day, calculate the total energy produced per day in kilowatt-hours (kWh).

A wind turbine generates 500 kW at wind speeds of 12 m/s. If the wind speed drops to 9 m/s, calculate the new power output assuming the power output is proportional to the cube of the wind speed.

A biogas plant produces 1,200 cubic meters of biogas per day with an energy content of 22 MJ per cubic meter. Calculate the total daily energy production in megajoules (MJ).

A hydroelectric plant operates with a head of 120 meters and a flow rate of 700 cubic meters per second. If the plant's efficiency is 88%, calculate the power output in megawatts (MW). (Use g = 9.8 m/s² for gravitational acceleration and the density of water = 1000 kg/m³)